Binder post for loose-leaf binders



May 26, 1925.

C. FRANZ, JR

BINDER POST FOR LOOSE LEAF BINDERS Filed FG'CL1 l, 1924 Patented May 26; 1925.

UNITED STATES 1,539,388 PATENT oFF-lcs.

CHARLES FRANZ.. JR., 0F MILWAUKEE, WISCONSIN.

- BINDER POST FR LOOSE-LEAF BINDER-S.

Application. iled February 1, 1924. Serial No. 689,923. l

T 0 all wl-20m 'it may concern.'

Be it known that I, CHARLES FRANZ, Jr., a citlzen of the 'United States, and resident of Milwaukee, in the county of Milwaukee,

post construction.

It is well known that binder posts, where they join the binder strips, are subjected to a great deal of lateral stresses which soon weaken and loosen the joint between the post and the binder strip and producean unsatisfactory condition.

Further than this, these blnder posts become sufficiently loosened to turn with reference to the binder strip and to cause further trouble.

This invention is designed to overcome the above noted defects and objects of such invention are to provide a binder post construction in which the post is securely and rigidly attached to the binder strip, in

which provision is made to prevent the turning of the post, and in which a sim le and easilyproduced construction is obtained.

An embodiment of the invention is shown in the accompanying drawings, in which Figure- 1 is a partial sectional view of a binder strip showing the post in one stage of attachment thereto.

Figure 2 is a partial sectional view showing the post completely attached to the str1 Fligure 3 is a plan view of the structure shown in Fi re 2. v

Figure 4 1s a sectional view on the line 4--4 of Figure 3.

Figure 5 is a bottom view of the structure shown in Figure 2.

Figure 6 is a fragmentary view of a ortion of the binder strip showing the ole which receives the lowerend of the post.

The binder comprises a binder strip 1 to which a. tubular post 2 is attached. This binder strip may be of any suitable type and may cooperate with a similar strip 3 provided with a downwardly extending post 4 adapted to enter the tubular post 2, as

`shown in dotted lines in Figures land 2. In forming this binder strip, a circular hole" 5 is punched for the receptlon of the tube 2,

and such hole is provided with one or more notches 6, preferably a pair of diametricalljy opposed notches being provided as illustrated in -Figure 6. formed with an outwardly projecting integral folded-ange 7 adjacent one end so as to leave a downwardly projecting lower portion 8.u This lower portion 8 is slotted on opposite sides or provided with cut-outs 9 for a purpose hereinafter to appear. After the post is thus formed, the projecting portion 8 is slipped through the aperture 5, as

illustrated in Figure 1, and, thereafter, the portion 8 is turned outwardly to form a bottom flange 8', as shown in Figures 2, 4 and 5. The cut out portions 9 permit the fiange to Hatten without danger of tearing the material and insuring a smooth and even contact between the fiange 8 and the bottom of the binder strip 1. Either during this attening process for the flange 8 or subsequent thereto, the upper fian'ge- 7 is pressed downwardly into the notchesG so that .a portion 10 thereof firmly fits and engages the sides of the notches. This is most readily accomplished by providing a tool adapted to surround the tube 2 and provided with project-ing portions to form Athe depressions 11 in theupper side of the flange 7, as shown in Figures 2, 3 and 4.

It is apparent that the portion 10 instead of being formed by projecting the flange 7 into the notches 6 might readlly be formed by projecting the flange 8 upwardly into such notches and that one or more notches 6 could be employed.

It will thus be seen that a post construction has been provided for loose leaf binders in which a very secure and firm joint is readily obtained Pbetween the tubular post and the binder strip, and in which all danger-of rotation of the post or loosening thereof is obviated.

Although one form of the inven ion has been described in-considerable det il, it is to be understood that the invention may be variously embodied and is, therefore, to be limited only as claimed.

. I claim:

1. The combination of an apertured binder strip having notches communicatin with said aperture, and a tubular post positioned within said aperture and having an integrally yformed folded ange intermediate its ends, and in contact with one side of said binder strip and having an'outwardly ex- The tubular post 2 is` tending flange positioned upon the opposite contact with the other side thereof, said side of said binder strip, one of said flanges outer flange having cut outs therein, and being pressed axially of said post into said said upper flange having portions pressed notches. downwardly into said notches.

6 2. The combination of a binder strip hav- In testimony that I claim the foregoing I 15 ing an aperture therein provided with have hereunto set vmy hand at Milwaukee, notches, a tubular post projecting through in the county of Milwaukee and State of said aperture and having a folded outward Wisconsin. ly projecting flange in contact with one side l0 of said strip and having an outer flange in CHARLES FRANZ, JR. 

